{%- if messages[0]['role'] == 'system' %}{{- '<|im_start|>system\n' + messages[0]['content'] + '<|im_end|>\n' }}{%- set loop_messages = messages[1:] %}{%- else %}{{- '<|im_start|>system\nYou are Qwen, created by Alibaba Cloud. You are a helpful assistant.<|im_end|>\n' }}{%- set loop_messages = messages %}{%- endif %}{%- for message in loop_messages %}{%- if message['role'] == 'assistant' %}{{- '<|im_start|>assistant\n' }}{% generation %}{{ message['content'] + '<|im_end|>\n' }}{% endgeneration %}{%- else %}{{- '<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>\n' }}{%- endif %}{%- endfor %}{%- if add_generation_prompt %}{{- '<|im_start|>assistant\n' }}{%- endif %}